OpreX Plant Image Analyzer

Plant Image Analyzer (PIA) is an application that processes image data from plant sites using AI technology. PIA analyzes images of devices such as gauges and converts readings to digital values. Unlike conventional methods in which a person visually checks the on-site devices and records the data, PIA is equipped with a feature that can automatically record the data digitally. This application can be used in conjunction with the Robot Management Core (RMC) to streamline plant maintenance and inspection work and improve work quality. This will enable the promotion of digitalization of plant field work processes.

Development Background

It is time-consuming for field operators to visually check and record data from field devices, which are located across a broad area. Hazardous areas and locations such as high places also place a heavy burden on workers in terms of safety. By using PIA in conjunction with on-site monitoring cameras or remote image capture using robots, analog values displayed on field devices can be converted to digital numerical data. The use of PIA can reduce the workload of field workers and improve safety, and the digitized values can be used in a variety of applications.


Main Functions

Convert Indicator Images to Digital Values

The GUI, including the management screen, can be displayed on a web browser to enable remote operation. A dedicated viewer is not required.

Supported Indicators

PIA supports the following device types.

  • Round analog (linear): Analog device with equal and circular scales
  • Rectangular analog (linear): Analog meter with even and horizontal or vertical scales
  • Level: Analog device that scales the liquid level in a liquid-filled vessel

Round meter image

PIA-round meter image-300px


Rectangular meter image

PIA-rectangular meter image300px

Level meter image

PIA-level meter image100px

Below is an example of coordinate selection for adjusting an image.

Round analog (linear)


Image Calibration
After meter registration, the image is calibrated so that PIA can process the meter image and provide accurate device indication values. Depending on the meter type, select and calibrate several different coordinates in the image. Once the image is calibrated, you can view the device details on the registration list page.

Follow these steps to calibrate an image of a analog meter.

  1. Select a point on the image that corresponds to the center of rotation of the meter pointer.
  2. Select a point on the image that corresponds to the minimum value of the meter.
  3. Select a point on the image that corresponds to the maximum value of the meter.
  4. Select a point on the image that corresponds to the end of the meter pointer that is facing away from the reading.

Relevance to other applications

PIA works with RMC to convert the images of the indicator taken by the robot into digital values. The converted digital values can be viewed on the RMC. PIA can also work with the CI server to convert instruction plan images from a robot, mobile device, or fixed camera into digital values, which can then be stored, displayed, and reflected in the controller on the CI server.

Functional Configuration

PIA is an application that has a web interface and an image input interface. PIA has an image analysis AI service for obtaining digital values from device images. And the indication plan image to a digital value through a web browser.

The Web Interface features

After setting the position of the indicator center, minimum, maximum, etc., You can input the indicator image and display the converted results. It is also possible to display the history of previous analysis results.


Register Meter page




Image Order page


The Image Analysis AI service

Provides a function that analyzes the input image and converts it to the digital value indicated by the indicator.

The Image Input Interface

Provides a function for inputting the instruction plan image from the robot or fixed camera.



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